Finding the Fourth Proportional to 679,139.04, 936,957.60 and 420,898.08
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Solution
The fourth proportional to 679,139.04, 936,957.60 and 420,898.08 is: 580,681.76
Step by Step Solution
- Step 1: Write the proportion equation
679,139.04 : 936,957.60 = 420,898.08 : x - Step 2: Convert to fraction form
679,139.04/936,957.60 = 420,898.08/x - Step 3: Cross multiply
679,139.04x = 936,957.60 × 420,898.08 - Step 4: Simplify right side
679,139.04x = 394,363,654,881.41 - Step 5: Solve for x
x = 394,363,654,881.41/679,139.04 - Step 6: Final answer
x = 580,681.76
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.